121002221999 has 2 divisors, whose sum is σ = 121002222000. Its totient is φ = 121002221998.

The previous prime is 121002221959. The next prime is 121002222013. The reversal of 121002221999 is 999122200121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121002221999 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121002221929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501110999 + 60501111000.

It is an arithmetic number, because the mean of its divisors is an integer number (60501111000).

Almost surely, 2^121002221999 is an apocalyptic number.

121002221999 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002221999 is an equidigital number, since it uses as much as digits as its factorization.

121002221999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 121002221999 in words is "one hundred twenty-one billion, two million, two hundred twenty-one thousand, nine hundred ninety-nine".